提取

Solanine was extracted from peel of a potato variety 'Zhong Shu 3' by using microwave and ethanol/acetic acid solvent. Crude extract was further purified and then qualified by HPLC.

应用微波辐射技术，用乙醇—乙酸双溶剂法从中薯3号马铃薯薯皮中提取了马铃薯植株和块茎中的生物碱龙葵素，对所得初提物进行了纯化，并应用HPLC技术对提取的龙葵素进行了定量分析。

The effects of solvent concentration, ratio of liquid to solid, microwave power and radiation time were evaluated by single factor and orthogonal experiments. The extraction conditions of flavones from Solidago canadensis by microwave-assisted method were optimized as 40:1 of the weight ratio of 50 % ethanol to twigs and microwave power of 700 W for 20 min.

并通过单因素实验和正交试验优化溶剂浓度、液固比、微波功率和微波辐射时间等微波提取条件，确定了微波辅助萃取法提取加拿大一枝黄花中黄酮类化合物的最佳条件为：乙醇浓度50%，液固比40：1，微波功率700W，微波辐射时间20min。

Firstly,surd or sonant judgment with each voice frame is done,then the multi-scale wavelet analysis is done only on the sonant frames to get pitches.In order to get accurate pitches,the intervals of local modulus maxima of dyadic wavelet coefficients are corrected according to amplitude information and appearance probability information.

针对这一问题，提出一种基于小波变换的基音周期提取改进算法，将TEO算子与二进小波变换结合起来，首先进行清浊判定，然后只对浊音帧采取多尺度小波分析提取周期，提出用幅度信息和出现概率信息校正二进小波模极大值间距，从而得到准确的周期。

Secondly,taking those into account,characteristic bands for paddy rice extraction were proposed and merged into SPOT-5 images in order to increase spectral information and improve the separability.

结果表明，该方法的总体提取效果较好，其提取精度与通常的监督分类方法相比有了较大的提高，只是在水稻和玉米交界处有误判现象。

Methods Fresh litchi peel was air-dried, extracted with 70% ethanol solvent in ultrasonic wave. The extract was then purified with D101 macroporous resin adsorption chromatography, C18 solid phase extraction and high performance liquid chromatography. And the component purified was identified by mass spectrography.

新鲜荔枝果皮阴干，用70％乙醇溶液以超声波浸提法提取，提取液经过D101大孔树脂吸附层析、C18小柱固相萃取、高效液相色谱法分离、纯化后，采用质谱法鉴定结构。

The results show that this process can not only speed up the reaction velocity and shorten the extraction time,but also improve the extraction rate of the product over 98% and the purity of the product over 95%.

研究结果表明，这一工艺路线不仅加快了反应进度，缩短了提取时间，同时使产品提取率提高到98%，产品纯度达95%以上，主要技术指标达到或优于国家规定的标准。

Results This Differential Extraction Kit is efficient to obtain high quality spermatid and epithelial cell DNA from the mixture samples with different proportion of sperm to epithelial cell.

对所提取的DNA进行定量分析和STR分型。结果该试剂盒能从精子和上皮细胞不同比例的混合斑中提取出高纯度的精细胞和上皮细胞DNA。

Methods Selective lysis of spermatid and epithelial cells combined with paramagnetic particle method were applied to extract the DNA from the mock samples under controlled conditions and forensic case samples, and template DNA were analyzed by STR genotype method.

采用差异提取试剂盒，选择性裂解精细胞和上皮细胞，结合磁珠法分别对人为控制条件下制备的模拟混合样本和案件中的混合斑检材进行精细胞DNA和上皮细胞DNA的分离提取。

The empirical mode decomposition method is introduced to extract the trend item of gyro's drift, but the local mean estimation isn't precision and the end effects exist in the conventional EMD method. The two-tap adaptive time-varying filter and the adaptive border estimation are used to modify the EMD. After the trend extraction, the method of time series analysis is used to make the autoregressive moving average model for stationary time series.

根据陀螺漂移的特性，提出采用经验模分解的方法对其趋势项进行提取，但传统的经验模分解方法存在局部均值估值不准，插值过程存在端点效应的问题，因此，本文又引入二拍自适应滤波及自适应边界估值来对原方法加以改进；在成功提取趋势项后，通过采用时间序列的分析方法，建立了陀螺漂移平稳时间序列的自回归滑动平均模型；并得出陀螺漂移模型可近似为常值加一阶马尔可夫过程这样一个结论。

The technology for construction of the road detector from edge detectors was described, the approach based on multivariate statistical hypothesis tests was applied to information fusion of SAR images, and the extracting result from two traditional Tupin methods and that from the method proposed in this paper were compared with each other.

首先，介绍了用边缘探测器构造道路探测器的方法；然后，将多参数统计假设检验的方法应用到全极化影像的信息融合中，并将该方法提取的结果与传统Tupin法提取的结果进行了比较。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。